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Updated Jun 4, 2014 - 3:47 pm

Arizona ex-con charged with Colorado sex assault

CENTENNIAL, Colo. (AP) — A man freed after serving nearly 40 years in an Arizona prison for a double murder is behind bars in Colorado, accused of sexually assaulting two children.

William Macumber was arrested in suburban Denver in October and remained in jail on $200,000 bond Wednesday. He is charged with four counts of sexual assault in Aurora allegedly starting in April 2013, five months after he was released from prison. Prosecutors allege the assaults continued through August 2013.

Court records show Macumber, 78, has pleaded not guilty in the case, which was first reported by the Arizona Republic (

Macumber was accused of inappropriately touching two young female relatives.

According to an arrest affidavit, Macumber was living with his son in suburban Denver after being released from an Arizona prison.

Upon learning of the assaults, Macumber’s son asked him to move out, which he did.

Ronald Macumber told the Arizona Republic that other relatives whom his father then tried to stay with –a social worker and a deputy sheriff — reported the allegations to police in September because they are legally required to report such accusations.

Macumber declined an interview request made through the Arapahoe County, Colorado, jail and Macumber’s attorney didn’t immediately return calls for comment.

Macumber was twice convicted and sentenced to life without parole for killing two 20-year-old telephone workers, Joyce Sterrenberg and Timothy McKillop, in what was considered a lovers’ lane area in then-desert land near Scottsdale, Arizona, in 1962. He was convicted for the first time in 1975 and tried again in 1976 and 1977 after an appeals court found the first judge should have allowed a ballistics expert to testify.

He was released from prison in November 2012, striking a deal with prosecutors after his lawyers challenged evidence in the case and pressed for another trial. Prosecutors said another trial wasn’t possible because key evidence had either been destroyed or lost over the years. He pleaded no contest to second-degree murder and was sentenced to time served.

Macumber’s defense attorneys argued that jurors weren’t told at his second trial that another man had confessed to killing the couple.

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